Tube-making machine.



E. H. POWERS.

TUBE MAKING- MACHINE.

APPLICATION FILED 11113.18, 1912.

Patented Mar 4, 1913.

2 SHEETS-SHEET 1 WITNESSES fax/ML WM 4%,, ATTORNEY E. H. POWERS, TUBE MAKING MACHINE. APPLICATION FILED MAR. 18, 1912.

' Qatented Mar. 4,- 1913- 2 SHEETS-SHEET 2.

ATTORNEY @TUNITEI) STA mandrel is employed, the

B NT QB- l( 1 EDWIN OF SAGINAW MICHIGAN ASSIGNO. d l IDN YL. EASTMAN;

TRUSTEE. or SAGINAW: MICHIGAN p H TUBE-MAKING "MACHINE.

To all whom it may concern Be it known that I, Eowix H. lowians, a citizen of the mted States, residing at Saginaw. in the' county of Saginaw-and glued sheet around the mandrel and for antomaticallyejecting the completed tube from the mandrel and includes means whereby the entire periphery of the completed tube isrolled upon by the ejecting device, thereby'produclng a smoother and more uniform surface to the tube. I

Another object of the invention is to pro- .y' ide rolling'devices that will not only roll the tube on the mandrel, but also are capable of being slightly shifted in position and to'thereupon performnot only their ordinary function 'of rolling theutube, but. also to eject the tube lengthwise from the mandrel.

31y improved rolling device is capable of being adaptedto numerous types of convolute tube-forming machines in which a ummed sheet being wound upon the mandrel by the opera tion of the machine. I have therefore illustrated and described in this specification only so much ofthe mechanism of a tube-forming machine as is necessary to explain the operation of. myinvention.

Vith. the above objects inv1ewand certain others which will appear later in the.

specification, my invention consists in'the devices illustrated and claimed and the equivalents thereof. a 1 In the drawings, Figure 1 is a perspectlve view of a convolute tube partly rolled; Fig. 2 is a similar view of a rolled tube on the mandrel; Fig.3 is a side View of my improved rolling device; Fig. 4 1s afront new of the rolls, showing their normal or rolling position with relation to the mandrel;

Fi 5 is a simllar view showing the rolls in,

v I Specification of-Letters Patent.

' Patented Mar. 1. 1 913.

Application filed March 13. 1912. serial N0 634,446.

their tilted osition. in which position thevserve to-eject the completed tube from th e mandrel: Fig. ti isla part sectional detail lttIWl11g the construction of the bearing that carries the rolls: lig; T is a topplan view broken a \vav in part. showmgthe nlllnilll'k'l and a number. of sets of rolls m place.

1 represents the mandrel-ofa tube-formingmachinc'. This mandrel may befeither of the rotating cr non-rotating type.

is a sheet of gummcdpaper to be wound upon the mandrel. I

represents a. plurality .of .winding belts; each of which drivenby a wheel :l. he wheels being mounted on a revoluble shafto.or, if desired a single drum'inay be used instead of thewheelsa; y

t3 and T. are pulleysv around which belt 3 passes, the run of the belt being as indicated by the arrow in 1' 1g. 2%, that is, uptlte. frcntfaee of pulley I, rearwardly around mandrel 1. up the front faceof pulleyfi and around wheel a. The pulleys 6 and T are mounted in a yoke S, the yoke being carried by a spindle S) which is slidahle lengthwise in a bushing 10, this bushing being revolubly mounted in asuitable stationary gitudinal slot 15, and spindle 9 is provided with a pro ecting pin 16 slidably. received in slot lfrso that'spintlle 9 may slide lengthwise in lmshing 10 and .ni'av be rotatedby the bushing when cranes-m 1311s oscillated. T o maintain proper tension of the'belt 3 and to it the belti to' conform to the increasing.diameter of the tube as the latter,

is being wont l on th e. .ma1 1d i;'el, I provide a compression pring 1T betweieli the endfof journahbon llfand yoke SQas sjhownin Figs. 3 and 7 Inpractice I 'a'pply a'numberbf sets of pulleys 6 and 7 sideby side lengthwise the mandrel, there being as many setsof pulleys as may berequired to' suit the length of the tube to be made.

The operation of the device is as follows. Sheet 2 (see 'Figs. 3 and 7 is fed in between the. belt 3 and the underside of mandrel 1' and iswound around the mandrel by the belt 3. That part of the sheet which forms the inner convolution of the tube is not gummed, but the remainder of the sheet is gu'mmed on the side nearest the mandrel. This" permits the tube to slide. around the mandrel while the tube is being formed. \Vhen the tube has been rolled 'in position on the mandrel, cranks 13 are simultaneously oscillated by means of the wrist pins 14, which are secured. together by'a connecting rod 18. The effect of this movement of the crank 13 is to turn bushing 10, spindle 9,- and yoke 8 with its pulleys 6 and 7, from the upright. position shown in Fig. 4, to an angular position, as shown in Fig. 5. -The belt thereupon takes up a slightly angular position with reference to the axis of-the tube, and continued movement of the beltnotonly revolves the tube but drives it with a screw-like movement endwise off the -mandrel 1. The belt may be prevented from running off the pulleys 6, 7, by any suitable guiding means, not

shown.

If the mandrell is of considerable length, as is necessary when long tubes are being ,made, I prefer to support its free end by means of a belt- 19 that passes around the mandrel 1 near its free end and normally slides upon it, the belt 19 being driven by a pulley 20. the axis of which is preferably at right angles to the axis of mandrel 1. so that belt 19 is approxin'iately quarter twist. hen the tube is driven off the mandrel 1 by the angular adjustment of rolls 6 and 7 as previously described, its free. end is received under belt 19, passing between'the inner surface of -the belt and mandrel 1. and thus out of the machine, the purpose of belt 19 being to sustain the free end of the mandrel and hold it in line against the opposite pull of the belts 3. The first tube is entered under belt 19 by hand, and thereafter, successive tubes following closely enter under the belt without assistance. \Vhen the completed tube is driven from mandrel 1 by the angular; adjustment of the belts, itwill be observed that all parts of the tube are rolled upon by the "successive belts as the tube leaves the mandrel. A smooth, hard surface is thus imparted to the tube, insuring that the finished tube walls will be of uniform compactness throughout, this feature being of particu-' lar importance in the manufacture of certain classes of tubes, as for instance. window shade rollers. The tightness of winding maybe regulated by means of the spring 17,'the pressure of which may be varied by turning the adjusting wheel 21, threaded on the spindle 9, as shown in Fig. 3.

While I have shown and described the belt 3 as being driven continually in one direction while the rolls 6' and 7 are turned angularly, it will be obvious that the same result could be obtained by reversing the direction of travel of the belt simultaneously with the angular adjusting of the rolls, in which case therolls are given the opposite inclination.

Having described my invention, what I claim and desire to secure by Letters Pat-- cut, is

1. A tube-forming device. comprising a mandrel, a belt engaging one side of said mandrel, a yoke, an upper and a lower belt carrying pulley mounted in said yoke, said belt normally traveling circumferentially on said mandrel in a direction at right angles to the axis thereof; and means for simultaneously changing the axial direction of said upper and lower pulleys to change the direction of travel of said belt with relation to the axis of said mandrel.

said yoke. a journal box, a spindle on saidyoke slidingly and revolubly received in said ournal box, a compression spring m terposed between said yoke and journal box.

and means for angularly turning said yoke, whereby to propel a formed tube lengthwise said mandrel.

3. A tube-forming device comprising a mandrel, a winding-belt, a'yoke, anupper and a lower'pulley for said belt mounted in said yoke, a journal box, a bushing revolubly mounted in said journal box, a spindle on said yoke slidingly received in said bushing, means connecting the spindle and bush-' ing to preventrotation ofthe spindle relative to the bushing, a compression spring interposed between. said yoke and journal box, a crank arm secured to said'bushing, and adapted to angularly turn said yoke:

' Intestimony whereof, I afiix mysignature in presence of two witnesses.

EDYVIN H. POVERS.

\Vitnesses CHRISTINE A, BRAIDEL, GEO. W. SMITH. 

